GMC Chevrolet SSR 2003 Owner's Manual page 162

Display Units (U.S./MET)
The feature allows you to choose the measurement
units. Press the personalization button until DISPLAY
UNITS appears in the display. To access the modes
for DISPLAY UNITS, press the select button.
Once DISPLAY UNITS is selected, press the select
button to scroll through the following modes:
Mode 1: UNITS: U.S. (ENGLISH)
Mode 2: UNITS: METRIC (km/L)
Mode 3: UNITS: METRIC (L/100km)
If you choose Mode 1, all information will be displayed
in English units.
If you choose Mode 2 or 3, all information will be
displayed in metric units.
Scroll through the list of modes. When the mode you
want is displayed on the DIC, press personalization
button to set your choice, return to the personalization
menu, and advance to the next programmable feature.
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Audio System(s)
Notice: Before adding any sound equipment to
your vehicle, such as an audio system, CD player,
CB radio, mobile telephone, or two-way radio, make
sure that it can be added by checking with your
dealer. Also, check federal rules covering mobile
radio and telephone units. If sound equipment can
be added, it is very important to do it properly.
Added sound equipment may interfere with
the operation of your vehicle's engine, radio,
or other systems, and even damage them.
Your vehicle's systems may interfere with the
operation of sound equipment that has been added.
Figure out which audio system is in your vehicle, find
out what your audio system can do, and how to operate
all of its controls.